Friction-clutch.



C. G. OBERLEY 6L R. GRIGNON.

FRIGTION CLUTCH.

APPLICATION FILED AUG. 23, 1912.

Patented Mar.11,1913.

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' G. G. OBBRLBY & R. GRIGNON.

FRIGTION CLUTCH.

APPLIOATION FILED AUG. 23, 1912.

Patented Mar. 11, 1913.

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NrrEn sarEs PATENT oEEioE.

CHARLES Gr. OBERLEY, OF ST. CLOUD, AND ROBERT GRIGNON, OF SAR/TELL,MINNESOTA.

FRICTION-CLUTCH.

Specification of Letters Patent.

Patented Mar. 11, 1913.

Application filed August 23, 1912. Serial No. 716,772.

To all whom t may conce/m Be it known that we, CHARLES G. OBERLEY andROBERT GRIGNON, citizens of the United States, residing at St. Cloud andSartell, respectively, in the county of Stearns and State of Minnesota,have invented new and useful Improvements in Friction-Clutches, of whichthe following is a specification. y

This invention relates to improvements in friction clutches of thatltype wherein two companion concentric drum-like parts and anintermediate clutch band are employed, the function of the clutch bandbeing to connect the companion parts whereby one is driven from theother or to disconnect the companion parts whereby the driving part runsfree.

rIhe principal object of the invention is to provide a construction ofthe general type stated wherein the adjustment maybe made in an easy andfacile manner and wherein the parts are organized with simplicity,compactness, and strength.

An embodiment of the. invention is illustrated in the accompanyingdrawings, in which Figure 1 is a vertical central sectional view withthe companion driving and driven parts in connected relation; Fig. 2 isa view in end elevation, partly broken away to show the internalorganization and with the parts in connected relation; Fig. 3 is across-sectional view showing the companion parts in disconnectedrelation; Fig. 4 is a longitudinal sectional view on the line 4 4 ofFig. 5; and Fig. 5 is a detail perspective view of a lever element whichis connected to an end of the clutch band and forms a part of the meansfor tightening or loosening said band.

Similar characters of reference designate corresponding parts throughoutthe several views.

In the example disclosed, power is to be transferred from one shaft toanother, the two shafts being shown at 1 and 2 and in alining relation.parts above referred to are shown at 3 and 4, the part 3 being keyed orotherwise fast on the shaft 1 and inclosing the part 4 which is fast onthe shaft 2. The clutch band is shown at 5 and surrounds the part 4,being The companion drum-like adapted to be tightened thereon and whentightened to connect the parts 3 and 4 so that one will be driven by theother. The ends of the band 5 are secured to the part 3, one end beingfixed as by a pin 6 and the other end being movably secured, for thispurpose, being .joined to a lever 7 The lever 7 includes an arm 7a whichprojects over the drum 4 and which terminates in an eye to receive theend of the strap 8, by means of which the band 5 is connected to saidlever. A nut 9 s threaded upon the end of the strap 8 to make secure theconnection thereof with the arm 7a. The lever 7 includes, also, avertical arm 7b which lies against the flat vertical wall of the drum 3and is pivoted to said wall, as by a bolt or pin 10. The arm 7b worksbetween the flat vertical wall of the drum 3 and the adjacent end of thedrum 4 and at its inner end carries a roller 11 to accommodate which theiiat wall of the drum 3 is recessed as at 12. When the lever 7 is movedin a direction to cause the movable end of the band 5 to approach thefixed end thereof, said band is tightened upon the drum 4. To eiect sucha movement of the lever 11 an axially slidable pin 13 may convenientlybe employed. In the example disclosed, the pin 13V is parallel to theshaft 1 and is movable axially through an opening 14 in the hub of thedrum 4, the opening 14 terminating at one end of the recess 12. The pin13 may be carried by a slidable part, for example, a collar 15 which isslidable on the shaft 1 and is operated by a lever 16. The opening 14may be shouldered at its outer end as at 17 and beyond the shoulder itmay be of square outline. In this case to conform to the outline of thesquared portion of the opening 15 and thereby to prevent the pin fromhaving any turning movement which, in the construction shown, mightinterfere with its efficient action.

The pin 13 at its inner end has a cam face 18 for engagement with theroller 11 and inwardly of the face 18 a transverse groove 19 in whichthe roller 11 is held by the tension of the band 5 when the latter istight upon the drum part 4.

Assuming that the band 5 is loose upon the part 3 and that the drivingelement is running free, as shown in Fig. 3, when it is ldesired toconnect the parts 3 and 4 so that one will be driven by the other, the

collar 15 and therewith the pin 13 is moved inwardly. Ultimately, thecam face 15 of said pin engages the roller 11 and rocks the lever 7 asshown in Fig. 2, so that the movable end of the band 5 approaches theiixed end of said band and the latter is thereby clamped tightly uponthe part 4, thus putting the parts 3 and 4 in connected relation andproviding for the rotation of the one with the other. This relation ismaintained by the engagement of the roller, 11 in the groove 19. Whilethis engagement is sufficiently strong to prevent any accidental outwardmovement of the pin 13, it does not interfere with an intentionaloutward movement thereof, as when the parts 3 and 4 are to bedisconnected. Then the pin 13 is withdrawn and the lever 7 is released,the band 5 will become loose on the part 3, and the driving part will bepermitted to run free.

It will be observed that the connection between the band 5 and thelever` 7 is located centrally between the sides of the parts 4. Thislocation of said connection not only provides for centralizing thetension on the band, but it also enables the band to be reversed uponthe part 4, in case it is necessary or desirable to reverse thedirection of the pull on said band. For this latter purpose the part 3has in its iiat side wall, approximately ninety 4degrees dist-ant fromthe pin 13 and the lever 7 when l0- cated as shown and at the oppositeside of.

the pin 6, openings 20 and 2l. The opening 2O is provided to receive thebolt or pin 10 which forms the pivot of the lever 7 and the opening 21,which is located inwardly of the opening 2O and is exactly similar tothe openingk14 above described, is provided to receive the pin 13. wWhenit is desired to reverse the direction of pull on the band 5, the bandis first disconnected from the lever 7 and from the pin 6, and isdisposed on the part 4 so as to extend in an opposite direction from thepin 6, but with the same face upon the band after which it is againconnected to said pin. Thereupon, the location of the lever 7 and pin 13is changed in the manner indicated, z'. e., by engaging the bolt or pin10 in the opening 20 and the pin 13 in the opening 21, after which theband is again connected to the lever 7 in the manner shown.

'While the invention has been disclosed in connection with thetransmission of power from one shaft to an alining shaft-or to twoalining shafts, one of which will run constantly, it is to be understoodthat the invention is not limited to this application and that it may beused for the transmission of power to or between gear elements otherthan shafts.

Having fully described our invention, we claim:

1. In a friction clutch, two companion concentric parts adapted to beconnected to rotate together or to be disconnected whereby one part mayrun free of the other, a clutch band surrounding the inner part andhaving one end fixed to the outer part, the outer part having a fiat endwall a lever which is pivoted to said Hat wall and is arranged betweensaid wall and the adjacent end of the inner part, the other end of theband being connected to said lever, and a pin slidable through said flatwall and having a cam face for engagement with the lever to rock thelatter and thereby tighten the band upon the inner part.

2. In a friction clutch, two companion concentric parts adapted to beconnected to rotate together or to be disconnected whereby one part mayrun free of the other, a clutch band surrounding the inner part andhaving one end fixed to the outer part, the outer part having a fiat endwall a lever which is pivoted to said flat wall and is arrangedbetweensaid flat wall and the adjacent end of the inner part, the leverhaving an arm which overhangs the inner part and t0 which the other endof the band is connected, and a pin slidable through said fiat wall andhaving a cam face for engagement with the lever to rock the latter andthereby tighten the band upon the inner part.

3. In a friction clutch, two companion concentric parts adapted to beconnected to rotate together or to be disconnected whereby one part mayrun free of the other, a clutch band surrounding the inner part andhaving one end fixed to the outer part, the Outer part having a flat endwall a lever which is pivoted to said Hat wall and is arranged betweensaid flat wall and the adjacent end of-the inner part, the other end ofthe band being connected to said lcver, and a pin slidable through saidiiat wall and having a cam face for engagement with the lever to rockthe latter and thereby tighten the band upon the inner part, the pinalso having a transverse groove located inwardly of said cam face and inwhich the lever engages under the tension of the band when the latter istight upon the inner part.

4. In a friction clutch, two companion concentric parts adapted to beconnected to rotate together or to be disconnected whereby one part mayrun free of the other, a clutch band surrounding the inner part andhaving one end fixed to the outer part, the outer part having a flat endwall a lever which is pivoted to said flat wall and is arranged betweensaid flat Wall and lever to rook the latter and thereby tighten theadjacent end of the inner part, the other the band upon the inner part.

end of the band being connected to said le- In testimony whereof We havehereunto ver, the said flat Wall having an opening set our hands inpresence of two subscrib- 5 therethrough which is shouldered and has ingWitnesses.

a portion thereof of square outline and a CHARLES Gr. OBERLEY. pinslidable through said opening and hav- ROBERT GRIGNON. ing a squareportion which Works in the Witnesses: square portion of said opening,the pin also R. B. BLOWER, 10 having a cani face for engagement With theW. A. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

